Revert "usb: gadget: mass_storage: added sysfs entry for cdrom to LUNs"

This reverts commit a821fa96a92a7b639dd862917475827a5f2c299e.
Revert "Disable OS check for the mass storage gadget"

This reverts commit 48adb4ad7f75e97ee8f0b8f01f4daccb3d6f5b54.
Revert "Removing endeavoru lun_cdrom flag to let ums work rw instead of ro."

This reverts commit c42da56cf147526656cb8d424e79cd25516d95a7.